*{
    margin: 0;
    padding: 0;
}
html, body{
    height: 100%;
    width: 100%;
}
.root {
    height: 100%;
    width: 100%;
    display: flex;
    flex-direction: column;
    background-color: #fff;
}
.title {
    height: 50px;
    display:table-cell;
    vertical-align:middle;
    text-align:center;
}
.title .item {
    display: inline-block;
    width: 15%;
    height: 50px;
    background-color: #fff;
}
.title .item a {
    display: block;
    height: 50px;
    margin: auto 0;
    text-decoration: none;
    text-align: center;
    background-color: #fff;
    line-height: 50px;
    font-size: 16px;
    color: #000;
}
.title .item a:hover {
    color: #2e7fff;
    background-color: #e0e0e0;
}
.tiao {
    height: 50%;
}
.lie {
    height: 50px;
    display:table-cell;
    vertical-align:middle;
    text-align:center;
    margin-bottom: 20px;
}
.lie .item {
    display: inline-block;
    width: 30%;
    height: 50px;
    background-color: #fff;
}
.lie .item a{
    display: block;
    height: 50px;
    margin: auto 0;
    text-decoration: none;
    text-align: center;
    background-color: #fff;
    line-height: 50px;
    font-size: 16px;
    color: #000;
}
.lie .item a:hover {
    color: #2e7fff;
    background-color: #e0e0e0;
}
.tu {
    flex: 1;
    display: flex;
}
.item1,.item2 {
    width: 50%;
}